<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <br />
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-button type="primary" @click="showAddCate">添加分类</el-button>
      </el-row>

      <!-- 表格 -->
      <zk-table
        :show-row-hover="false"
        index-text="#"
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
      >
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color:lightgreen"></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>

        <template slot="opt" slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
        </template>
      </zk-table>

      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog title="添加分类" @close='closeAddCate' :visible.sync="addCateDialogVisible" width="50%">
      <!-- 添加分类表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRuleForm"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        
        <el-form-item label="父级分类" prop="cat_pid">
          <!-- expandTrigger='hover'(鼠标悬停触发级联) v-model(设置级联菜单绑定数据) :options(指定级联菜单数据源)  :props(用来配置数据显示的规则) 
          clearable(提供“X”号完成删除文本功能) change-on-select(是否可以选中任意一级的菜单)-->
          <el-cascader
            expandTrigger="hover"
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChange"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  created() {
    this.getCateList();
  },
  data() {
    return {
      selectedKeys:[],
      cascaderProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children'
      },
      //保存1,2级父级分类的列表
      parentCateList: [],
      addCateFormRules: {
        //验证规则
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },
      addCateForm: {
        //分类名称
        cat_name: "",
        //添加分类的父级id，0则表示父级为0.添加一级分类
        cat_pid: 0,
        //添加分类的等级，0则表示添加一级分类
        cat_level: 0
      },
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok"
        },
        {
          label: "分类",
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          type: "template",
          template: "opt"
        }
      ],
      cateList: [],
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      addCateDialogVisible: false
    };
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.querInfo
      });
      console.log(res);

      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败");
      }
      this.cateList = res.data.result;
      this.total = res.data.total;
    },
    handleSizeChange(newSize) {
      //当pagesize发生改变时触发
      this.querInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newPage) {
      //当pagenum发生改变时触发
      this.querInfo.pagenum = newPage;
      this.getCateList();
    },
    showAddCate() {
      this.getCate();
      this.addCateDialogVisible = true;
    },
     addCate() {
      console.log(this.addCateForm);
      this.$refs.addCateFormRuleForm.validate(async val=>{
        if(!val) return 
        const {data:res}=await this.$http.post('categories',this.addCateForm)
        if(res.meta.status!==201){
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false;
      })
    },
    closeAddCate(){
      this.$refs.addCateFormRuleForm.resetFields()
      this.selectedKeys=[]
      this.addCateForm.cat_level=0
      this.addCateForm.cat_level=0
    },
    async getCate() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 }
      });
      if (res.meta.status !== 200) {
        return this.$message.console.error("获取数据失败");
      }
      this.parentCateList = res.data;
    },
    parentCateChange(){
      console.log(this.selectedKeys);
      if(this.selectedKeys.length>0){
        this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1]
        this.addCateForm.cat_level=this.selectedKeys.length
        return 
      }else{
        this.addCateForm.cat_level=0
        this.addCateForm.cat_level=0
      }

    }
  }
};
</script>

<style lang="less" scoped>
</style>